315191 has 8 divisors (see below), whose sum is σ = 339120. Its totient is φ = 292032.

The previous prime is 315181. The next prime is 315193. The reversal of 315191 is 191513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 315191 - 2⁶ = 315127 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851 + ... + 1163.

It is an arithmetic number, because the mean of its divisors is an integer number (42390).

2³¹⁵¹⁹¹ is an apocalyptic number.

315191 is a deficient number, since it is larger than the sum of its proper divisors (23929).

315191 is a wasteful number, since it uses less digits than its factorization.

315191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385.

The product of its digits is 135, while the sum is 20.

The square root of 315191 is about 561.4187385544. The cubic root of 315191 is about 68.0546705671.

The spelling of 315191 in words is "three hundred fifteen thousand, one hundred ninety-one".